type SearchParamsModifier = Record<string, string> | ((params: URLSearchParams) => void);
/**
 * Asserts that the given value is a Response object.
 * This is useful for type guards and uses Jest's expect to throw an error if the value is not a Response.
 * @param response - The value to assert is a Response object.
 */
export declare function assertIsResponse(response: unknown): asserts response is Response;
/**
 * Creates a new Request object with the given search parameters.
 * @param request - The original Request object.
 * @param modifier - The search parameters to add or modify.
 * @returns A new Request object with the modified search parameters.
 */
export declare function createRequestWithSearchParams(request: Request, modifier: SearchParamsModifier): Request;
/**
 * Creates a mock WorkOS authentication response object.
 * @param overrides - Any properties to override in the mock response.
 * @returns A mock WorkOS authentication response object.
 */
export declare function createAuthWithCodeResponse(overrides?: Record<string, unknown>): {
    accessToken: string;
    refreshToken: string;
    user: {
        id: string;
        email: string;
        emailVerified: boolean;
        profilePictureUrl: string;
        firstName: string;
        lastName: string;
        object: "user";
        createdAt: string;
        updatedAt: string;
        lastSignInAt: string;
        externalId: null;
    };
};
export {};